JP3194464B2 - POLYESTER FIBER FABRIC AND PROCESS FOR PRODUCING THE SAME - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester fiber fabric having fibrillated fluff and having high water absorbency, and a method for producing the same.

[0002]

2. Description of the Related Art There are a wide variety of improved and advanced techniques for production and processing of polyester fiber fabrics. For example, the technology for obtaining silk-like fabrics has led to the following problems in terms of swelling, drapability, and resilience. Things very close to silk fabrics can now be obtained. However, in terms of dryness, opacity and the like, they are still unsatisfactory as compared with silk fabrics and remain as problems.

[0003] In order to solve such problems, the use of fibers having a modified fiber cross-sectional shape, fine denier fibers of 0.1 denier or less has been attempted, but the cloth may have a rough or hard surface. However, there are problems such as the need for advanced technology for spinning, and satisfactory dry feeling and slimy feeling have not been obtained. In addition, there is a method of giving an opaque feeling by adding titanium oxide or the like to the fiber. However, the full-dull fiber has disadvantages such as abrasion of metal and damage to equipment for fabric production.

As a method of giving fluff to the surface of a woven or knitted fabric,
JP-A-55-16906, JP-B-61-9427
According to these proposals, fibers are produced by using a large amount of a polymer other than polyester in order to actively fibrillate the fibers. Therefore, not only the improvement of the texture and the effect of the woven or knitted fabric cannot be expected, but also the dyeing property has a defect. In addition, in the production of a woven or knitted fabric composed of these fibers, not only a complicated process such as treatment with a swelling agent of a polyamide polymer is required, but also a micro-scale fiber structure such as a fibril structure in polyester fibers is highly required. It could not be suppressed, and it was difficult to impart a new feel, texture, function, and the like to the woven or knitted fabric by the fibrillation phenomenon by an industrially simple and stable method.

Further, Japanese Patent Publication No. 2-58374 discloses that
Before and after alkali hydrolysis treatment, a woven or knitted product using a polyester fiber containing an organic compound which is made of an organic compound and is incompatible with a polyester, for example, a metal salt of an organic sulfonic acid represented by the general formula R-SO ₃ M is mixed. Which discloses a method of fibrillating by buffing treatment. In this method, in order to generate fibrillation on the surface of the woven or knitted fabric, weaving or knitting is performed such that the polyester fiber containing the additive is disposed on the surface of the woven or knitted fabric. JP-A-56-68161 discloses a method of subjecting a woven or knitted polyester fiber to a hydrolysis treatment by heating and pressurizing the surface of the woven and knitted fabric, and then subjecting the woven or knitted fabric to physical brushing such as buffing and napping. It has been disclosed. In this method, it is disclosed that an additive such as a modified polyester is added to the polyester fiber, but this additive is not considered to promote fibrillation.

[0006] According to these methods, it is premised that a physical raising process or a buffing process is performed. However, applying such a raising process or a buffing process imposes a great burden on the woven or knitted fabric, damaging the woven or knitted fabric, not only reducing the strength, but also cutting during the hydrolysis process in the raised process. Powder drops easily occur due to the dropping of fibers, which is a factor in production trouble.

Further, the method using ultrafine fibers is infinitely thin due to the conditions of the spinneret and the spinning process, and it is impossible to carry out spinning without changing the fineness steplessly. Furthermore, the method of forming a microfibrillated fluff by performing an alkali hydrolysis treatment, a buffing treatment, etc. on a woven or knitted polyester fiber in which an incompatible additive is dispersed and blended has a drawback that the fluff often falls off. ing.

In order to solve the problems of conventional woven and knitted fabrics of polyester fibers, such as improvement of water absorption and sweat absorption, Japanese Patent Application Laid-Open No. 54-101866 proposes to provide fine holes in polyester fibers. Have been. It is disclosed that in order to form micropores, a polyester is mixed with a metal salt of an organic sulfonic acid, molded, and then treated with an aqueous solution of an alkaline compound to melt and remove the metal salt of the organic sulfonic acid. According to this proposal, the water absorption of the woven or knitted fabric depends on the micropores on the fiber surface and the special cross-sectional shape thereof, and it is assumed that fibrillation does not occur on the fiber surface.

[0009]

DISCLOSURE OF THE INVENTION The present invention is intended to solve the problems in the texture that the polyester fiber cloth has a hard touch and a slimy feeling on the surface of the cloth, and the function inferior in water absorption and sweat absorption. The purpose of the present invention is to provide a suitable swelling feeling, drape property, resilience, dry feeling, slimy feeling, and furthermore, high water absorption, Moreover, it is an object of the present invention to provide a polyester fiber cloth in which fluff present on the surface of the constituent fibers is less likely to fall off.

[0010]

According to the present invention, at least one surface of the fabric has a diameter of 0.05 to 5 μm and a length of 5 μm on the surface of the polyester fiber constituting the fabric.
m or more and fibrilized fluff , width of 0.05 μm or more, length of 5 μm or more, and the interval between adjacent grooves 5 μm or less Has a plurality of irregular voids having a diameter of 0.1 μm or more in a fiber cross section and a proportion of 2.5% or more in a fiber cross-sectional area, at least a part of the voids communicates with the fiber surface, and A polyester fiber cloth, which is characterized in that it forms a part thereof,

And a general formula R—SO ₃ M (where R represents an alkyl group having 3 to 30 carbon atoms, or an aryl or alkylaryl group having 4 to 70 carbon atoms, and M represents an alkali metal). The organic sulfonic acid metal salt is 0.1 to
A fabric composed of polyester fibers containing 8 to 10% by weight or a mixture of an organic sulfonic acid metal salt represented by the above formula and polyethylene having an average molecular weight of 10,000 or less is 0.1 to 10% by weight . At least one whole surface
To the polyhydric alcohol ethylene oxide adduct
A method for producing a polyester fiber cloth, comprising impregnating or applying a luke weight loss promoting agent , performing a heat treatment at a temperature of 100 ° C. or more, and then performing an alkali weight loss treatment at a weight loss rate of 10% by weight or more .

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The polyester fiber cloth of the present invention is such that a part or the whole of a cloth such as a woven fabric or a knitted fabric is composed of a polyester fiber, and at least one surface of the cloth is
As shown in FIG. 1, the polyester fiber constituting the cloth has a diameter of 0.05 to 5 μm and a length of 5 μm on the fiber surface.
It has a fibrillated fluff of at least μm and, in addition to the fibrillated fluff, a width of at least 0.05 μm and a length of 5 μm.
μm or more, the spacing between adjacent grooves has a large number of streaky grooves highly oriented in the fiber axis direction of 5μm or less, the diameter of the fiber in the cross section of the fiber is 0.1μm or more inside the fiber, the proportion of the fiber cross-sectional area It has a plurality of irregular voids of 2.5% or more, and at least a part of the voids communicates with the fiber surface to form a part of the streak-like groove.

In the present invention, the fibrillated fluff on the fiber surface of the polyester fibers constituting the fabric does not sufficiently improve the texture of the fabric if its diameter is less than 0.05 μm or its length is less than 5 μm. Lacks flexibility, dryness and sliminess. Further, when the width of the streak-like groove is less than 0.05 μm or the length is less than 5 μm,
Insufficient elimination of dryness. In addition, the voids inside the fibers of the polyester-based fiber give the fabric an excellent texture, and reduce the rigidity of the fiber to give the fabric flexibility. In addition, the voids inside the fiber have an irregular shape, and at least a part thereof communicates with the fiber surface to form a part of a streak-like groove, so that moisture on the fiber surface can be taken into the fiber. And imparts water absorption to the fabric.

FIG. 1 shows an electron micrograph of a cross section showing an example of a fiber constituting the fabric of the present invention. The electron micrograph has a large number of streaks which are highly oriented in the fiber axis direction and a plurality of fibers are provided inside the fiber. It can be seen that the fiber has regular voids, and at least a part of the voids inside the fiber communicates with the fiber surface to form a part of the streak-like groove. FIG. 5 shows a schematic diagram thereof. 2 and 3
Shows an electron micrograph showing an example of the surface of the fabric of the present invention. It can be seen that the fabric of the present invention has many fibrillated fluffs. FIG. 4 is a photograph showing a cross section of the mixed fiber constituting the fabric obtained in Example 10. In the present invention, the strength is obtained by using a fibrillated fiber and another non-fibrillated fiber in combination. Points such as reduction can be further improved.

The polyester polymer of the polyester fiber constituting the fabric in the present invention has ethylene terephthalate as a main repeating unit. Terephthalic acid or its ester-forming derivative is used as a dicarboxylic acid component, and ethylene glycol or 1,4 is used. A typical example is a polyester having at least one glycol selected from butanediol or an ester-forming derivative thereof as a glycol component, but a part of the dicarboxylic acid component may be replaced with another dicarboxylic acid component. Often, a part of the glycol component may be replaced by another glycol component.

Other dicarboxylic acid components include dicarboxylic acids such as isophthalic acid, naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenylsulfonedicarboxylic acid, adipic acid, sebacic acid, 1,4-cyclohexanedicarboxylic acid, and esters thereof. Sex derivative,
A metal sulfonate group-containing acid component such as an alkali metal salt such as 5-sulfoisophthalic acid or 2-sulfoisophthalic acid or 1,8-dicarboxynaphthalene-3-sulfonic acid; p-oxybenzoic acid; p-β- Oxycarboxylic acids such as oxyethoxybenzoic acid, or ester-forming derivatives thereof, and the like.

Other glycol components include those having 3 to 3 carbon atoms.
10 lower alkylene glycols, 1,4-cyclohexanedimethanol, neopentyl glycol, 1,4-
Examples include bis (β-oxyethoxy) benzene, bisglycol ether of bisphenol-A, polyethylene glycol or polypropylene glycol of various molecular weights, ethylene oxide-propylene oxide copolymer, and various derivatives of polyalkylene glycol.

Further, within a range where the polyester is substantially linear, a polycarboxylic acid such as trimellitic acid or pyromellitic acid, trimethylolpropane or an ethylene oxide addition derivative thereof, pentaerythritol, glycerin or an ethylene oxide addition thereof Polyols such as derivatives, monohydric polyalkylene oxides of various molecular weights or derivatives thereof, and polymerization terminators such as phenylacetic acid may be used.

The method for producing the polyester fiber fabric of the present invention will be described below. In the present invention, the polyester-based fiber used in the construction of the fabric contains the organic sulfonic acid metal salt represented by the above general formula in an amount of 0.1 to 8% by weight or has an average molecular weight of 1 to 8%.
0.1 to 1 of a mixture with polyethylene of up to 000
It must be a polyester fiber containing 0% by weight.

The metal salt of organic sulfonic acid contained in the polyester-based fiber, when the fabric is subjected to an alkali weight reduction treatment,
It becomes an active point in alkali hydrolysis, and forms a number of fibrillated fluffs or further streak grooves on the fiber surface of the polyester fiber, and forms irregular voids inside the fiber, and further reduces a part of the voids. It is an essential component for communicating with the fiber surface to form a part of the streak-like groove. When the content of the metal organic sulfonic acid salt is less than 0.1% by weight, formation of fibrillated fluff, streak-like groove, voids Formation and communication with the fiber surface become insufficient, and the object of improving the texture is not achieved. If it exceeds 8% by weight, the stability in the process passage deteriorates. The preferred content of the organic metal sulfonic acid salt,
0.5 to 5% by weight.

In addition, a mixture of a metal salt of an organic sulfonic acid and polyethylene contained in a polyester-based fiber, when a fabric is subjected to an alkali weight-reducing treatment, particularly, a large number of streaky grooves on the fiber surface and the inside of the fiber due to the coexistence of polyethylene. It promotes the formation of irregular voids and has a content of 0.1
If it is less than the weight%, formation of fibrillated fluff, streaky grooves, formation of voids and communication with the fiber surface become insufficient,
If the purpose of improving the texture is not achieved, and if the content exceeds 10% by weight, the process passage stability deteriorates. As a preferred content of a mixture of an organic sulfonic acid metal salt and polyethylene,
0.5 to 7% by weight.

In the present invention, the organic sulfonic acid metal salt represented by the above general formula contained in the polyester fiber includes, for example, butyl sulfonic acid and hexyl sulfone as alkyl sulfonic acid alkali metal salts having 3 to 30 carbon atoms. Acid, octyl sulfonic acid, decyl sulfonic acid, lauryl sulfonic acid, myristyl sulfonic acid, palmity sulfonic acid, sodium salt such as stearyl sulfonic acid, potassium salt, lithium salt, or toluene sulfonic acid, sodium salt of dodecyl benzene sulfonic acid, Potassium salts, lithium salts and the like can be mentioned.

Among them, preferred specific examples of the organic metal sulfonate used in the present invention include sodium alkyl sulfonates. More preferred specific examples include:
Such a metal salt of an organic sulfonic acid may not be a single compound, but may be a mixture of various metal sulfonic acid metal salts represented by the above general formula. May be.

The metal organic sulfonic acid salt may be used alone, but it is preferable to use a small amount of a known stabilizer, antioxidant or the like for the purpose of improving thermal stability. is there. Stabilizers added to the organic sulfonic acid metal salt include hindered phenol compounds and thioether compounds. These compounds may be added alone, but in order to further improve heat resistance,
Co-addition is also preferred.

Usually, commercially available metal salts of organic sulfonic acids contain inorganic impurities such as sodium sulfate and sodium chloride. Therefore, when melt-spinning a polyester mixed with a metal salt of an organic sulfonic acid, these impurities are easily captured by the filter in the die pack and are deposited on the filter over time. As a result, the back pressure of the filter is increased, and further, the thread may be broken. These phenomena appear as remarkable phenomena as the blending amount of the organic metal sulfonic acid salt into the polyester increases.

Therefore, the metal salt of organic sulfonic acid used in the present invention preferably has an inorganic content of 1,500 ppm or less. In particular, when an alkylsulfonic acid sodium salt is used, the sodium oxide content is 500 pp.
m and the sodium sulfate content is 1,000
It is preferably at most 0 ppm.

The polyethylene mixed with the metal organic sulfonic acid salt contained in the polyester fiber has an average molecular weight of 10,000 or less, preferably, in order to reduce the high melt viscosity of the metal organic sulfonic acid salt. 5,
000 or less low-viscosity polyethylene is used. The mixing ratio (weight ratio) in the mixture of the organic sulfonic acid metal salt and polyethylene is preferably metal organic sulfonic acid salt: polyethylene = 5: 95 to 95: 5.

The inclusion of the metal organic sulfonic acid salt or the mixture of the organic metal sulfonic acid metal salt and the polyethylene in the polyester fiber is performed by adding the polyester polymer in the process of producing the polyester polymer before the fiber shaping or in the spinning step. . The method for producing the fiber is not particularly limited.

A polyester fiber containing such a metal salt of an organic sulfonic acid or a mixture of a metal salt of an organic sulfonic acid and polyethylene is woven or knitted to obtain a fabric in which the polyester fiber is a constituent fiber.

In obtaining the polyester fiber fabric of the present invention, in the form of the woven or knitted fabric, at least one surface of the fabric is coated with a polyhydric alcohol alcohol.
It is essential to impregnate or apply an alkali weight loss promoter composed of a lenoxide adduct and heat-treat it at a temperature of 100 ° C. or higher. At this time, when applying the alkali weight loss promoter, it is preferable to apply it to one side of the fabric. By applying to only one side of the fabric, fluff that has been fibrillated on only one side of the fabric, streaky grooves on one side of the fiber surface,
Irregular voids can be generated inside the fiber .

As described above, the alkali weight loss accelerating agent in the present invention is a compound that increases the weight loss rate of a fabric in a subsequent alkali weight loss treatment when impregnated or coated, as compared with when not impregnated or coated, Multivalent Al
Polyvalent alcohol formed by adding ethylene oxide to
It consists of an ethylene oxide adduct.

As the polyhydric alcohol ethylene oxide adduct, ethylene glycol, propylene glycol,
It is formed by adding 2 mol or more of ethylene oxide to a polyhydric alcohol such as a dihydric alcohol such as hydrobenzoin, benzopinacol, cyclopentane-1,2-diol, cyclohexane-1,4-diol and a trihydric alcohol such as glycerin. The method of the addition reaction is not particularly limited, and may be a known method. Examples of the polyhydric alcohol ethylene oxide adduct preferably used include ethylene oxide of ethylene glycol 5 to 30.
Adducts and ethylene oxide 3-28 adducts of glycerin are mentioned.

[0033]

[0034]

These alkali weight loss accelerators have an alkali weight loss promoter concentration of 500 g / l or less, preferably 250 g / l or less.
Impregnate or apply an aqueous solution of not more than g / l. This impregnation or application is performed by a known method, and any method such as dipping, printing by a flat screen or rotary screen, knife coater type or touch roll type coating, and spraying is used. Additives such as sizing agents may be included in the aqueous solution of the alkali weight loss promoter as required. At this time, the amount of the mixture of the sizing agent and the alkali weight loss promoting agent is preferably 5 to 30% by weight based on the fabric.

Polyvalent of the alkali weight loss promoter in the present invention
Alcohol ethylene oxide adduct reduces fabric strength
Hardly occurs, and is excellent in workability and safety in the process. In addition to the above aqueous solution, it may be contained in an organic solvent solution such as alcohol. When the organic solvent solution is used, preferably 5% by weight or more based on the solvent. The concentration is good.

When applied to one side of the fabric, it is preferable to include a sizing agent in the alkali weight loss promoter, and by adjusting the viscosity to an appropriate level by mixing with the sizing agent, uniform application is possible. As the sizing agent used at this time, wheat starch, rice bran, tracant gum, alginate rubber, locust bean gum, methyl cellulose, carboxymethyl cellulose, nafka crystal rubber, polyvinyl alcohol, polyvinyl acetate, sodium polyacrylate, etc.
Semi-synthetic or synthetic pastes can be used.

After impregnation or application and drying, 100
The heat treatment is carried out at a temperature of not less than ℃, preferably the heat treatment,
In the case of a normal pressure and humidity heat atmosphere having a relative humidity of 90% or more, a temperature of 150 to 220 ° C. for 30 seconds or more, more preferably 170 ° C.
At 200 to 60 ° C. for 60 seconds to 10 minutes, and in a high-pressure moist heat atmosphere, at a temperature of 100 to 150 ° C., one or more, more preferably one or more.
In the case of a dry atmosphere at 10 to 135 ° C. for 10 to 60 minutes and a relative humidity of less than 90%, the drying is performed at a temperature of 150 ° C. or more for 15 seconds or more, more preferably 170 ° C. or more for 30 seconds to 10 minutes.

By the heat treatment, the polyhydric alcohol ethylene oxide adduct impregnated or applied to the fabric permeates into the polyester fiber, and when the fabric is subjected to alkali weight reduction treatment, the organic sulfonic acid metal salt contained in the fiber is reduced. Alternatively, the amount is reduced from the existing portion of the mixture of the organic sulfonic acid metal salt and the polyethylene, and further promotes the formation of fibrillated fluff on the fiber surface, and acts as a weight loss promoter. In addition, the polyhydric alcohol ethylene oxide adduct promotes the formation of irregular voids inside the fiber, and acts as a weight loss promoter.

Next, it is necessary to subject the heat-treated fabric to an alkali reduction treatment with an aqueous solution of an alkaline compound. Weight loss rate is 10 times of polyester fiber
% Or more, preferably 15% by weight or more. By this alkali weight reduction treatment, a polyhydric alcohol
In the constituent polyester fibers of the fabric impregnated or coated with the ethylene oxide adduct , the weight loss accompanying the elution of the organic sulfonic acid metal salt or the mixture of the organic sulfonic acid metal salt and polyethylene contained easily occurs, and at least the surface of the cloth On the surface of polyester fiber
Fibrillated fluff, streaks and irregular voids inside the fiber
Gaps form.

The treatment for reducing the weight of alkali by 15% by weight or more
A fibrillated fluff having a diameter of 0.05 to 5 μm and a length of 5 μm or more on the fabric surface, and a width of 0.05 μm on the fiber surface of the fabric surface.
5 μm or more, the length of 5 μm or more, the interval between adjacent grooves 5 μm or less, along with forming a large number of streaky grooves highly oriented in the fiber axis direction, the diameter of the fiber in the cross section of the fiber is 0.1 μm or more inside the fiber, 2.5% of fiber cross-sectional area
The plurality of irregular voids are formed, and at least a part of the void communicates with the fiber surface to form a part of the streak-like groove. Weight loss rate of less than 10% by weight in alkali weight reduction treatment
In this case, the fibrillated fluff becomes insufficient and the weight loss rate is 5
When it is 0% by weight or more, the strength of the fabric is greatly reduced.

In the alkali weight reduction treatment, as an alkaline compound, an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide, or an alkaline earth metal hydroxide such as calcium hydroxide or magnesium hydroxide is used. At the time, for the purpose of shortening the alkali reduction treatment time and stabilizing the alkali reduction treatment, amines such as triethanolamine, diethanolamine, monoethanolamine, etc.
A quaternary ammonium salt, a phosphoric acid ester compound, a polyhydric alcohol compound or the like may be added and used in combination, and the treatment may be performed in an aqueous alkaline compound solution.

As the alkali weight reduction method, any known method generally applied to polyester-based fabrics as weight reduction processing is applied.
It can be appropriately changed according to the fineness of the polyester fiber constituting the fabric, the amount of the inclusions, the composition ratio, and the like. As a processing method, it is preferable to apply a method in which a kneading action is added by contact between fabrics or between a fabric and a processing device wall during processing,
A liquid flow method using a liquid flow dyeing device or the like is suitable.

The treatment conditions can be appropriately changed according to the fineness of the fibers constituting the fabric, the weight reduction rate, and the like.
The concentration is appropriately selected within the range of 00 g / l, and preferably 50 g / l or less in the case of a fine fiber fabric. The processing temperature is 60 to 120C, preferably 90 to 110C.

In the present invention, the fabric may be constituted by using only the polyester-based fibers. However, for the purpose of maintaining the strength of the woven or knitted fabric, other fibers which are not reduced or are hardly reduced may be mixed. When other fibers are mixed, the texture and water absorption of the woven or knitted fabric according to the present invention must be within a range that does not impair the water absorption, and the mixing ratio of the other fibers is set to less than 80% by weight.

The polyester-based fiber fabric of the present invention is naturally subjected to dyeing or printing after the alkali weight reduction treatment in the production thereof, so that the fibrillated fluff is combined with the whole or partial coloring. A variety of advanced design effects can be provided.

[0047]

The present invention will be described below in more detail with reference to examples. In addition, each characteristic value in an example is a thing measured by the following method.
Good, fairly good, and bad are shown respectively.

<Intrinsic Viscosity> The intrinsic viscosity is a value measured by dissolving a sample in a phenol / tetrachloroethane (50/50) mixed solvent at 25 ° C. using an Ubbelohde viscometer.

<Abrasion loss rate> JIS L1018 Knitted fabric test method According to the abrasion strength 6.18.5E method (Martindale method), the number of abrasions is performed 1000 times, and calculated by the following equation. Abrasion weight loss rate (%) = [fabric weight before abrasion (g)-fabric weight after abrasion (g)] / [fabric weight before abrasion (g)] x 1
00

Example 1 A polyethylene terephthalate fiber (75 denier / 75%) containing 3% by weight of a mixture of 80 parts by weight of sodium alkyl sulfonate having an average carbon number of 12 to 17 and 20 parts by weight of polyethylene having an average molecular weight of 2,000. Using 36 filaments), a flat knitted fabric of 24 G was knitted. The obtained knitted fabric is immersed in a 5% by weight aqueous solution of glycerin ethylene oxide 10 mol adduct, squeezed to an aqueous solution adhesion rate of 100%, dried at 110 ° C., and then dried at 110 ° C.
Heat treatment was performed at 80 ° C. for 2 minutes. Next, a 30 g / l aqueous solution of sodium hydroxide was used to perform a weight reduction treatment at a boiling temperature for 15 minutes in an alkaline aqueous solution having a bath ratio of 1:50. The weight loss rate of the obtained knitted fabric determined by the gravimetric method was 10% by weight. Table 1 shows the formation of fibrillated fluff on the fiber surface of the obtained knitted fabric and the evaluation results of the texture of the knitted fabric.

(Examples 2 to 3) Fibrilization of the fiber surface of the obtained knitted fabric was carried out in the same manner as in Example 1 except that the weight loss rate during the alkali weight loss treatment was changed. Table 1 shows the formation of fluff and the evaluation results of the texture of the knitted fabric.

Comparative Example 1 A polyethylene terephthalate fiber (75 denier / 75%) containing 3% by weight of a mixture of 80 parts by weight of sodium alkyl sulfonate having an average carbon number of 12 to 17 and 20 parts by weight of polyethylene having an average molecular weight of 2,000. Using 36 filaments), a flat knitted fabric of 24 G was knitted. The obtained knitted fabric was subjected to a weight reduction treatment at a boiling temperature of 30 minutes in an alkaline aqueous solution having a bath ratio of 1:50 using a 30 g / l aqueous solution of sodium hydroxide without being treated with a 10 mol adduct of glycerin ethylene oxide. . The weight loss rate of the obtained knitted fabric determined by a gravimetric method was 19% by weight. Table 1 shows the formation of fibrillated fluff on the fiber surface of the obtained knitted fabric and the evaluation results of the texture of the knitted fabric.

(Comparative Example 2) A fibrillated fluff on the fiber surface of the obtained knitted fabric was obtained in the same manner as in Comparative Example 1, except that the weight loss rate during the alkali weight loss treatment was changed. Table 1 shows the formation status of the fabric and the evaluation results of the texture of the knitted fabric.
It was shown to.

[0054]

[Table 1]

Example 4 A polyethylene terephthalate fiber (75 denier / 75%) containing 3% by weight of a mixture of 80 parts by weight of sodium alkyl sulfonate having an average carbon number of 12 to 17 and 20 parts by weight of polyethylene having an average molecular weight of 2,000. Using 36 filaments), a flat knitted fabric of 24 G was knitted. The obtained knitted fabric was immersed in a 50 g / l aqueous solution of glycerin ethylene oxide 10 mol adduct, squeezed to an aqueous solution adhesion rate of 100%, dried at 110 ° C, and then heat-treated at 180 ° C for 2 minutes. Next, using a 30 g / l aqueous solution of sodium hydroxide, a weight reduction treatment was performed for 20 minutes at a boiling temperature in an alkaline aqueous solution having a bath ratio of 1:50. The weight loss rate of the obtained knitted fabric determined by the gravimetric method was 13% by weight. Table 2 shows the formation of streaky grooves on the fiber surface of the obtained knitted fabric, the formation of irregular voids, and the evaluation results of the texture and water absorption of the knitted fabric.

(Examples 5 to 6) The knitted fabric obtained was subjected to weight loss treatment in the same manner as in Example 4 except that the weight loss rate during the alkali weight reduction treatment was changed. Table 2 shows the formation of grooves, the formation of irregular voids, and the texture of the knitted fabric.

Comparative Example 3 A polyethylene terephthalate fiber (75 denier / 75%) containing 3% by weight of a mixture of 80 parts by weight of sodium alkyl sulfonate having an average carbon number of 12 to 17 and 20 parts by weight of polyethylene having an average molecular weight of 2,000. Using 36 filaments), a flat knitted fabric of 24 G was knitted. The obtained knitted fabric was subjected to a 20-minute reduction treatment at a boiling temperature in an alkaline aqueous solution having a bath ratio of 1:50 using a 30 g / l aqueous solution of sodium hydroxide without being treated with an adduct of 10 mol of glycerin ethylene oxide. . The weight loss rate of the obtained knitted fabric determined by the weight method was 9% by weight. Table 2 shows the formation of streaky grooves on the fiber surface of the obtained knitted fabric, the formation of irregular voids, and the texture of the knitted fabric.

(Comparative Examples 4 and 5) A streaky fiber surface of a knitted fabric obtained in the same manner as in Comparative Example 3 except that the weight loss rate during the alkali weight reduction treatment was changed. Table 2 shows the formation of grooves, the formation of irregular voids, and the texture of the knitted fabric.

[0059]

[Table 2]

(Example 7) Polyethylene terephthalate fiber having an intrinsic viscosity of 0.71 and a density of 1.38 g / cm ³ containing 3% by weight of sodium alkyl sulfonate having an average carbon number of 12 to 17 (75 denier / 36 filaments)
Was used to knit a flat knitted fabric of 24G. The following aqueous solution was applied to this knitted fabric by spraying on one side of the knitted fabric.
After drying for 2 minutes in a dry heat atmosphere at a temperature of 190 ° C.
Heat treated for seconds. The application rate of the aqueous solution is an average of 5
It was 0% by weight.

Aqueous solution: glycerin ethylene oxide 10 mol adduct 10 parts by weight Water 90 parts by weight

Thereafter, the heat-treated knitted fabric was subjected to alkali treatment at a boiling temperature for 30 minutes in a 20 g / l aqueous solution of sodium hydroxide and an aqueous alkali solution having a bath ratio of 1:50, and neutralized and dried by a conventional method. The weight loss rate of the obtained knitted fabric was 30%, and the weight loss rate of abrasion was 2.1%. The obtained knitted fabric had a fluff in which the polyethylene terephthalate fiber on one side to which the aqueous solution was applied was fibrillated, and a soft, dry and slimy fabric was obtained.

(Example 8) In Example 7, polyethylene terephthalate fibers having an average carbon number of 12 to 1 were used.
7 containing 3 parts by weight of a mixture of 80 parts by weight of sodium alkyl sulfonate and 20 parts by weight of polyethylene having an average molecular weight of 2,000 0.71 and a density of 1.38 g /
The treatment was carried out in the same manner as in Example 7, except that polyethylene terephthalate fibers (75 denier / 36 filaments) of cm ³ were used. The weight loss rate of the obtained knitted fabric was 33%, and the wear weight loss rate was 2.0%. The obtained knitted fabric had a fluff in which the polyethylene terephthalate fiber on one side to which the aqueous solution was applied was fibrillated, and a soft, dry and slimy fabric was obtained.

Example 9 Polyethylene terephthalate fiber containing 3% of a mixture of 80 parts by weight of sodium alkyl sulfonate having an average carbon number of 12 to 17 and 20 parts by weight of polyethylene having an average molecular weight of 2,000 ( 75 denier / 36 filament, circular section yarn)
A high-shrinkage polyethylene terephthalate fiber (30 denier / 8 filament, circular cross-section yarn) is mixed into a warp, and a normal polyethylene terephthalate fiber (150
1 consisting of denier / 96 filaments, circular cross-section yarn)
Using a yarn having a twist of 500 T / M as a weft, weaving at a warp weave density of 120 yarns / inch and a weft yarn weave density of 60 yarns / inch.
Relax in water under pressure at 20 ° C, dry, 18
The intermediate setting was performed at 0 ° C. The following sizing agent-containing aqueous solution of an alkali weight loss promoter was applied to the above woven fabric with a roller screen.

Aqueous solution containing sizing agent and alkali-reducing accelerator: glycerin ethylene oxide 10 mol adduct 20 parts by weight Water 20 parts by weight Fine gum G-17 (10% aqueous solution) 60 parts by weight

Further, drying and heat treatment by a tenter at 180 ° C. for 90 seconds were performed. The adhesion amount of the mixture of the sizing agent and the alkali weight loss promoting agent was 20% by weight (to fabric). Then, the excess glue on the surface is washed away with 40 ° C. hot water, and 3%
, An alkali weight reduction treatment was performed at a boiling temperature to a weight loss rate of 35% by weight.

Example 10 Processing was performed in the same manner as in Example 9 except that the alkali weight reduction treatment time was changed to reduce the weight loss rate to 20% by weight. Table 3 shows the evaluation results of the woven fabric. Table 3 shows the evaluation results of the obtained woven fabric. FIG. 4 shows an electron micrograph of the surface of the obtained fabric.

(Comparative Example 6) The same treatment as in Example 9 was performed except that the alkali weight reduction treatment was not performed. Table 3 shows the evaluation results of the obtained woven fabric.

(Comparative Example 7) The same processing as in Example 9 was performed except that the heat treatment was not performed. Table 3 shows the evaluation results of the obtained woven fabric.

(Comparative Example 8) The same treatment as in Example 9 was performed except that the application of the alkali weight loss promoting agent was not performed. Table 3 shows the evaluation results of the obtained woven fabric.

(Comparative Example 9) As the warp, 75 denier / 35 made of regular polyethylene terephthalate was used.
The same treatment as in Example 9 was performed using the filament.
Table 3 shows the evaluation results of the obtained woven fabric.

[0072]

[Table 3]

Table 3 shows the occurrence of fibrils and the occurrence of streak grooves on the surface of the woven fabrics of Examples 9 and 10 and Comparative Examples 6, 7, 8, and 9 observed with a scanning electron microscope. In addition, the results of the evaluation of the texture of the woven fabric and the texture of the hairy hair by touch and visual observation, and the results of the evaluation of Example 9 and Comparative Example 4 also on the water absorption are shown.

The water absorption was evaluated by measuring the woven fabric with a diameter of 15 cm.
Was attached to the embroidery round frame, and a drop of distilled water was dropped from the burette onto the fabric by a water drop method, and the time until the water droplet was absorbed into the fiber of the fabric and disappeared from the fabric surface was measured. . At this time, the distance between the tip of the burette and the fabric surface was 1 cm, and the relative humidity was 55 to 60 at room temperature.
%, And the measurement was repeated 5 to 7 times for each sample, and the average value was used as the measured value. At this time, the average amount of one drop of water was 0.039 ml.

Table 3 shows the results of observation by a scanning electron microscope of the occurrence of fibrils on the surface of the woven fabric and the occurrence of streak grooves in the fiber, and the evaluation results of the texture of the woven fabric and the texture of the hairy hair, as well as ◎ and ○. , Δ, ×, and the water absorption shows the above-mentioned measurement results. Here, ◎ indicates the best evaluation result, and thereafter, the evaluation decreases in order, and x indicates the lowest evaluation, and the symbols △ and × are not practical.

The following can be seen from the evaluation results in Table 3.
When examining the state of generation of streaky grooves of the warp and the state of generation of fibrils on the surface of the woven fabric of Example 9, a continuous streak-like groove was well formed on the fiber surface of the warp in observation with a scanning electron microscope. Thus, the fibers appearing on the surface of the warp were almost fibrillated, and it was confirmed that the ends of the fibril-like fibers protruded very well from the woven fabric surface. According to electron micrographs, the streaks formed on the fiber surface of the warp have a width of 0.3 to 1 μm, a length of 20 μm or more, an interval between adjacent grooves of 0.5 to 2 μm, and fibrils protruding from the fabric surface. The fiber end has a diameter of 0.3
It was estimated to be １1 μm with a protrusion length of 20-100 μm. The woven fabric having such streaky grooves and fibril-shaped fiber ends has a very good touch and visual feel and a hairy hair feel, and the alkali weight loss accelerator treated and heated applied to the woven fabric of Example 9 It is confirmed that the conditions of the treatment and the alkali reduction treatment are appropriate.

Further, the measured value of the water absorption of the woven fabric was 2 minutes 30 minutes.
Second, which indicates that the fabric has good water absorption. In addition, the strength of the woven fabric had a tear strength which was practically no problem due to the high shrinkage polyester fiber in the warp.

Next, a comparison between Examples 9 and 10 and Comparative Example 6, which showed this good result, shows that the alkali weight reduction rate, that is, the alkali weight reduction processing time, the formation state of the streaky grooves and the fibril fiber ends, and As is clear from Table 3, the correlation with the texture of the woven fabric shows that, when the alkali weight reduction treatment is performed, the streak-like grooves are formed well, and the formation state of the fibril-like fiber ends is the alkali weight reduction rate. It can be seen that the texture increases with the increase and the texture of the fabric also improves. For this reason, the alkali reduction treatment is indispensable for the formation of streak-like grooves, and the treatment rate is preferably higher.

Subsequently, by comparing Example 1 with Comparative Example 7, it is important to apply a heat treatment after applying an alkali weight loss promoting agent to the formation of streaks and fibril-like fiber ends and the texture of the fabric. It can be seen that it has an effect.

Further, in Comparative Example 9, ordinary polyethylene terephthalate (75 denier / 36 filaments) was used for the warp of the woven fabric. Despite the treatment, the evaluation results show that almost no streaks are formed in the fibers of the warp, and almost no fibrillation occurs. When the water absorption of the woven fabric of Comparative Example 9 was measured, the measured value was 50 minutes and 1 second, and this value indicates poor water absorption, which is a defect of the polyester fiber.
From this, it has been proved that, when the method of the present invention is applied as described above, it is necessary to weave and knit a woven or knitted fabric using a fiber containing a metal salt of an organic sulfonic acid. I have.

[0081]

The polyester fiber fabric of the present invention has a moderate swelling feeling, drape property and resilience, a dry feeling,
A fabric having a slimy feeling, a fabric having fine fluff with less falling off on the constituent fiber surface, and according to the present invention,
Without using complicated processes, it can be obtained by processing in the form of a cloth, in various post-processing steps such as scouring, alkali weight reduction processing, finishing processing, etc. applied to ordinary polyester fiber cloth. Yes, it can be manufactured with good processability.

Further, the woven or knitted fabric produced by the method of the present invention does not require a physical raising treatment, so that it has sufficient strength, has a good hair-like texture and flexibility, and has a water absorbing property. It is a woven and knitted fabric that also has a unique texture like sand silk, luxury suede, and velvet.

[0083]

[Brief description of the drawings]

FIG. 1 is an electron micrograph (× 3) of a fiber cross section of an example of a polyester fiber constituting a polyester fiber fabric of the present invention.
500).

FIG. 2 is an electron micrograph (× 350) of a cloth surface of an example of the polyester fiber cloth of the present invention.

FIG. 3 is an electron micrograph (× 1500) of a cloth surface of an example of the polyester fiber cloth of the present invention.

FIG. 4 is an electron micrograph (× 350) of a fiber cross section of an example of a polyester fiber constituting the polyester fiber fabric of the present invention obtained in Example 10.

FIG. 5 schematically shows a state in which a streak groove on the fiber surface of the polyester fiber and a part of voids inside the fiber communicate with the fiber surface to form a streak groove in the polyester fiber fabric of the present invention. FIG.

Continued on the front page (51) Int.Cl. ⁷ Identification code FI D06M 5/02 A (72) Inventor Isao Ueno 4-1-60 Sunadabashi, Higashi-ku, Nagoya-shi, Aichi Pref. Mitsubishi Rayon Co., Ltd. Product Development Laboratory (72 ) Inventor Mitsuo Tanaka 4-160 Sunadabashi, Higashi-ku, Nagoya City, Aichi Prefecture Mitsubishi Rayon Co., Ltd. Product Development Research Center (72) Inventor Yasushi Yamaguchi 2-3-18 Nakanoshima, Kita-ku, Osaka, Osaka Inside the branch (72) Inventor Hiroyasu Murai 2-3-18 Nakanoshima, Kita-ku, Osaka-shi, Osaka Mitsubishi Rayon Co., Ltd. Osaka branch (56) References JP-A-6-248512 (JP, A) JP-A-1- 156583 (JP, A) JP-B 63-6667 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06M 11/00-11/84

Claims (4)

(57) [Claims] 1. A fibrillated fluff having a diameter of 0.05 to 5 μm and a length of 5 μm or more, and a width of 0.05 μm or more on the surface of a polyester fiber constituting the fabric on at least one surface of the fabric. , Having a length of 5 μm or more,
The fiber has a large number of streak grooves highly oriented in the fiber axis direction with an interval of 5 μm or less between adjacent grooves, and has a diameter of 0.1 μm or more in the fiber cross section inside the fiber and a ratio of 2.5% to the fiber cross-sectional area. % Of a plurality of irregular voids, wherein at least a part of the voids communicates with the fiber surface to form a part of a streak-like groove. 2. A compound represented by the general formula R—SO ₃ M (where R represents an alkyl group having 3 to 30 carbon atoms, or an aryl group or an alkylaryl group having 4 to 70 carbon atoms, and M represents an alkali metal). Impregnating or applying at least one surface of a fabric composed of polyester fibers containing 0.1 to 8% by weight of a metal salt of an organic sulfonic acid to be treated with an alkali weight loss promoter comprising a polyhydric alcohol ethylene oxide adduct, A method for producing a polyester fiber cloth, comprising subjecting a polyester fiber cloth to a heat treatment at a temperature of 100 ° C. or more, followed by an alkali weight loss treatment of a weight loss rate of 10% by weight or more. 3. As a polyhydric alcohol ethylene oxide adduct, 2 mol% of ethylene oxide is added to the polyhydric alcohol.
3. The method for producing a polyester fiber cloth according to claim 2, wherein a polyhydric alcohol ethylene oxide adduct produced by the above addition is used. 4. A compound represented by the general formula R—SO ₃ M (where R represents an alkyl group having 3 to 30 carbon atoms, or an aryl group or alkylaryl group having 4 to 70 carbon atoms, and M represents an alkali metal). A mixture of the organic sulfonic acid metal salt to be used and polyethylene having an average molecular weight of 10,000 or less is 0.1 to 0.1%.
4. The method for producing a polyester fiber cloth according to claim 2, wherein a cloth composed of polyester fibers containing 10% by weight is used.